change wording in hard fork description section

changed wording in hard fork section because reasons. Added prospective slot of next hardfork to communicate that more are coming because it never stops.

its everywhere and all at the same time.

README.md

@@ -86,9 +86,9 @@ See [LICENSE](LICENSE).
 
 If you want to help out, see [CONTRIBUTING](CONTRIBUTING.md) for a set of guidelines.
 
-## Scheduled mandatory software upgrades
+## Scheduled software upgrades
 
-Monero uses a fixed-schedule mandatory software upgrade (hard fork) mechanism to implement new features. This means that users of Monero (end users and service providers) need to run current versions and upgrade their software on a regular schedule. Mandatory software upgrades occur during the months of March and September. The required software for these upgrades will be available prior to the scheduled date. Please check the repository prior to this date for the proper Monero software version. Below is the historical schedule and the projected schedule for the next upgrade.
+Monero uses a fixed-schedule software upgrade (hard fork) mechanism to implement new features. This means that users of Monero (end users and service providers) should run current versions and upgrade their software on a regular schedule. Software upgrades occur during the months of April and October. The required software for these upgrades will be available prior to the scheduled date. Please check the repository prior to this date for the proper Monero software version. Below is the historical schedule and the projected schedule for the next upgrade.
 Dates are provided in the format YYYY-MM-DD. 
 
 
@@ -100,12 +100,13 @@ Dates are provided in the format YYYY-MM-DD.
 | 1288616                        | 2017-04-15 | v5                | v0.10.3.0              | v0.10.3.1                  | Adjusted minimum blocksize and fee algorithm      |
 | 1400000                        | 2017-09-16 | v6                | v0.11.0.0              | v0.11.0.0                  | Allow only RingCT transactions, allow only >= ringsize 5      |
 | 1546000                        | 2018-04-06 | v7                | v0.12.0.0              | v0.12.0.0                  | Cryptonight variant 1, ringsize >= 7, sorted inputs
+| XXXXXXX                        | 2018-10-XX | XX                | XXXXXXXXX              | XXXXXXXXX                  | X
 
 X's indicate that these details have not been determined as of commit date.
 
 ## Release staging schedule and protocol
 
-Approximately three months prior to a scheduled mandatory software upgrade, a branch from Master will be created with the new release version tag. Pull requests that address bugs should then be made to both Master and the new release branch. Pull requests that require extensive review and testing (generally, optimizations and new features) should *not* be made to the release branch. 
+Approximately three months prior to a scheduled software upgrade, a branch from Master will be created with the new release version tag. Pull requests that address bugs should then be made to both Master and the new release branch. Pull requests that require extensive review and testing (generally, optimizations and new features) should *not* be made to the release branch. 
 
 ## Installing Monero from a package